gusguts44

Would installing a UDP in my car increase MPG ? Feedback for those who have one installed would be appreciated

jthorn9

Installed and any real world improvements, sorry not really. In theory yes they will improve mpg, but the added strain they put on the charging system (which can be pretty severe if you're running a mid sized or larger aftermarket stereo) as well as there initial cost, isn't really worth the savings. I thing a tuner with a good tune will improve mpg and make more power than the UDPs will.